Add sparse matrix interface #2006

Job	Run time
Typos	5s
Pytest Conda Py3 POCL	3m 1s
Pytest Conda Py3 Intel	2m 45s
Ruff	10s
basedpyright	2m 2s
Tests for downstream project mirgecom_examples	6s
Documentation	2m 26s
Tests for downstream project mirgecom	5s
Examples Conda Py3	1m 55s
Tests for downstream project meshmode	10m 36s
Tests for downstream project grudge	11m 37s
	34m 48s

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